/Engine/Source/Runtime/Engine/Classes/Kismet/BlueprintSetLibrary.h
Assigns Result to the intersection of Set A and Set B. That is, Result will contain all elements that are in both Set A and Set B. To intersect with the empty set use Clear.
static void Set_Intersection ( const [TSet](API\Runtime\Core\Containers\TSet)< int32 > & A, const [TSet](API\Runtime\Core\Containers\TSet)< int32 > & B, [TSet](API\Runtime\Core\Containers\TSet)< int32 > & Result )